Energy-saving boiler exhaust purification system and method

Abstract

The invention relates to an energy-saving boiler exhaust purification system and method, and relates to the technical field of boiler waste gas treatment. The first driving device drives the filtering assembly to operate in the filtering box to be in collision contact with the introduced waste gas, so that granular impurities in the waste gas are adsorbed and filtered in the filtering box, and the preliminarily filtered waste gas continues to be conveyed into the purification device through cooperation of the ventilation pipe; a second driving device drives a fluted disc to drive a rotary drum to rotate and cooperates with a pressurizing mechanism to pressurize reducing agent liquid in the rotary drum, so that small-particle liquid is formed after a catalyst is pressurized and is dispersed to all directions of the purification device to cooperate with the catalyst to fully contact with gas for reaction; and nitrogen oxides and sulfur oxides are removed through oxidation, so that the boiler waste gas can be fully filtered and purified, the treatment process is simplified, and the energy consumption in the waste gas purification process is reduced.

Description

Technical Field

[0001] This invention relates to the field of boiler exhaust gas treatment, and in particular to an energy-saving boiler exhaust gas purification system and method. Background Technology

[0002] Boiler combustion produces exhaust gases containing a large number of harmful substances, such as sulfur oxides, nitrogen oxides, and particulate matter, which pose serious threats to the environment and human health. Currently, countries are imposing increasingly stringent emission standards on boiler exhaust gases, driving the rapid development of exhaust gas purification technologies.

[0003] Currently, increasingly stringent emission standards for boiler exhaust gases in various countries are driving the rapid development of exhaust gas purification technologies. Common exhaust gas purification technologies include wet desulfurization, selective catalytic reduction (SCR) denitrification, and electrostatic precipitators. For example, SCR works by using ammonia or urea to reduce nitrogen oxides in exhaust gases under the action of a catalyst. Its advantages include high denitrification efficiency, but its disadvantages include high catalyst cost and susceptibility to poisoning. Wet desulfurization, on the other hand, involves spraying an alkaline solution to react with sulfur oxides in the exhaust gas to form sulfates, thus achieving desulfurization. Its advantages include high desulfurization efficiency, but it suffers from high energy consumption, complex equipment, and high operating costs. Summary of the Invention

[0004] 1. Technical problems to be solved The purpose of this application is to provide an energy-saving boiler exhaust purification system and method to solve the problems of high energy consumption, complex equipment, and high operating costs.

[0005] The energy-saving boiler exhaust purification system provided in this application adopts the following technical solution: The device includes an exhaust gas collection assembly, a filter box fixedly installed at the output end of the exhaust gas collection assembly, a first driving device at the top of the filter box, a filter assembly at the output end of the first driving device, a vent pipe fixedly connected to one side of the filter box, a purification device fixedly connected to one end of the vent pipe, a pressurizing mechanism at the top of the purification device, a second driving device at the top of the purification device, a rotating cylinder rotatably connected inside the purification device, a gear plate fixedly installed at the top of the rotating cylinder, the output end of the second driving device meshing with the gear plate, the output end of the pressurizing mechanism extending into the interior of the rotating cylinder, an exhaust pipe fixedly connected to one side of the purification device, and several spray holes opened on the rotating cylinder. By adopting the above technical solution, the exhaust gas generated in the boiler is transported to the interior of the filter box by the suction force generated inside the exhaust gas collection component. The first drive device drives the filter component to operate inside the filter box and collide with the incoming exhaust gas, so that particulate impurities in the exhaust gas are adsorbed and filtered inside the filter box. The pre-filtered exhaust gas is then transported to the purification device through the ventilation pipe. The second drive device drives the toothed disc to rotate the drum, and the pressurizing mechanism pressurizes the reducing agent liquid inside. The pressurized catalyst forms small liquid particles that are dispersed in all directions of the purification device, allowing the catalyst to fully contact the gas and react. Nitrogen oxides and sulfur oxides are removed through oxidation. This combination enables the boiler exhaust gas to be fully filtered and purified, and the treatment process is simplified, reducing the energy consumption of the exhaust gas purification process.

[0006] Preferably, the exhaust gas collection assembly includes a fan, an exhaust gas collection pipe is fixedly connected to the top of the fan, an external expansion hopper is fixedly connected to the output end of the fan, and the interior of the external expansion hopper is connected to the interior of the filter box. By adopting the above technical solution, the exhaust gas collection pipe is connected to the boiler's exhaust pipe, and the outer expansion hopper at the fan output end is tightly connected to the filter box. When gas is generated in the boiler, the fan is started to generate suction force inside, which drives the gas to flow at high speed into the filter box, so that the exhaust gas can quickly and centrally enter the filter box for filtration.

[0007] Preferably, the first driving device includes a first driving motor, a first gear is fixedly mounted on the output end of the first driving motor, a transmission gear meshes with one side of the first gear, and the output ends of the first gear and the transmission gear are both threadedly connected to the filter assembly. By adopting the above technical solution, the first drive motor is started to drive the first gear to rotate, thereby driving the transmission gear to rotate in opposite directions. This enables the filter assembly to rotate inside the filter box and come into contact with the exhaust gas, thus providing the filter assembly with the driving force to rotate. This allows the filter assembly to rotate and change its contact surface with the exhaust gas, blocking and filtering impurities on its outer surface.

[0008] Preferably, the filter assembly includes a mandrel, a filter cartridge is sleeved on the outer surface of the mandrel, a pulley is provided at the output end of the first drive motor, a second gear is fixedly connected to the output end of the pulley, and the number of mandrels and filter cartridges is set to several. By adopting the above technical solution, the first drive motor and the first gear work together to drive the transmission gear to rotate, while the pulley drives the second gear to rotate. This allows the first drive motor to provide a drive source for multiple sets of spindles at the same time, so that the spindles drive multiple sets of filter cartridges to rotate simultaneously. When the exhaust gas enters the filter box, it collides with the contact plate of the filter cartridges as they rotate, so that particulate impurities in the exhaust gas are blocked and filtered on the filter cartridges. In this way, particulate impurities in the exhaust gas are removed, achieving a fast and efficient filtration effect.

[0009] Preferably, the purification device includes a purification chamber, an air inlet is provided on the inner wall of the purification chamber, a horizontal plate is fixedly connected inside the purification chamber, and the rotating drum is rotatably connected to the top of the horizontal plate; By adopting the above technical solution, an air inlet is set at the connection end of the ventilation pipe inside the purification chamber. After the exhaust gas has been initially filtered, it continues to be conveyed into the purification chamber through the ventilation pipe. The pressurizing mechanism pressurizes the reducing agent liquid inside the rotating drum, while the second driving device drives the rotating drum to rotate, causing the liquid inside to generate centrifugal force. The rotating drum is driven by the second driving device to disperse and spray the reducing agent liquid inside through the external spray holes. It reacts with the catalyst filled inside the purification chamber, so that the exhaust gas can come into contact with it and react to carry out the purification process.

[0010] Preferably, the pressurization mechanism includes a pressurization cylinder, a piston rod is provided inside the pressurization cylinder, a piston plate is fixedly connected to one end of the piston rod, and the piston rod extends into the interior of the rotating cylinder; By adopting the above technical solution, the booster cylinder is placed at the top of the purification chamber. When the exhaust gas enters the purification chamber, the booster cylinder is activated to drive the piston rod to extend downward and push the piston plate into the interior of the rotating cylinder, so as to apply pressure to the reducing agent liquid inside the rotating cylinder. This causes the reducing agent liquid inside the rotating cylinder to flow from top to bottom and be squeezed out. It can be squeezed out of the interior of the rotating cylinder and sprayed out from the nozzle. After the gas reacts with the catalyst, it comes into full contact with the reducing agent to carry out an oxidation-reduction reaction to remove nitrogen oxides and sulfur oxides.

[0011] Preferably, the second driving device includes a second driving motor, and a second driving gear is fixedly connected to the output end of the second driving motor, the second driving gear meshing with a gear disk; By adopting the above technical solution, the second drive gear meshes with the gear disc. When the exhaust gas enters the purification chamber, the booster cylinder, in conjunction with the piston rod and piston plate, applies pressure inside the rotating drum. At the same time, the second drive motor is started to drive the gear disc to rotate, thereby driving the rotating drum to rotate on the top of the horizontal plate. This allows the reducing agent inside to be pressurized and then dispersed from the nozzle into the purification chamber by generating centrifugal force. After the catalyst and reducing agent fully contact the exhaust gas and undergo a chemical reaction, the gas is purified to remove nitrogen oxides and sulfur oxides.

[0012] This application also discloses an energy-saving boiler exhaust purification method, based on the above-mentioned energy-saving boiler exhaust purification system, including the following steps: S: Connect the inlet end of the exhaust gas collection pipe to the boiler exhaust port, and connect the outer expansion hopper to the filter box. Start the fan to draw the exhaust gas generated in the boiler into the interior of the filter box.

[0013] S: Start the first drive motor to drive the first gear and pulley to rotate simultaneously, thereby driving the transmission gear and the second gear to rotate. At the same time, the two sets of spindles and filter cartridges rotate inside the filter box and collide with the incoming exhaust gas to adsorb and filter the impurities in the exhaust gas, removing particulate matter.

[0014] S: The filtered exhaust gas enters the purification chamber through a square vent pipe. The purification chamber is filled with catalyst, and the reducing agent is introduced into the inside of the rotating drum. At the same time, the booster cylinder is activated to drive the piston rod to extend into the inside of the rotating drum, pushing the piston plate downward to pressurize the reducing agent inside the rotating drum and make it spray out from the nozzle of the rotating drum.

[0015] S: After the exhaust gas enters, the second drive motor is started to drive the second drive gear to rotate the gear plate and drive the rotating drum to rotate synchronously. This causes the reducing agent inside the rotating drum to generate centrifugal force and be sprayed into all directions inside the purification chamber while being pressurized. This causes the exhaust gas to react with the injected reducing agent, removing nitrogen oxides and sulfur oxides. Finally, the purified gas is discharged through the exhaust pipe.

[0016] 2. Beneficial effects In summary, this application includes at least one of the following beneficial technical effects of an energy-saving boiler exhaust purification system and method: 1. This invention provides an energy-saving boiler exhaust purification system and method. The system utilizes the suction force generated within the exhaust gas collection assembly to transport the exhaust gas generated in the boiler to the interior of a filter box. A first driving device drives the filter assembly to operate within the filter box, colliding and contacting the incoming exhaust gas. This allows particulate impurities in the exhaust gas to be adsorbed and filtered within the filter box. The pre-filtered exhaust gas is then transported to a purification device via a ventilation pipe. A second driving device drives a gear disc to rotate a rotating drum, and a pressurizing mechanism pressurizes a reducing agent liquid within the drum. This pressurized catalyst forms small liquid particles that disperse in all directions of the purification device, allowing for thorough contact and reaction between the catalyst and the gas. Oxidation removes nitrogen oxides and sulfur oxides. This combined approach enables thorough filtration and purification of boiler exhaust gas, simplifies the process, and reduces energy consumption during the exhaust gas purification process.

[0017] 2. This invention provides an energy-saving boiler exhaust purification system and method. A first drive motor, in conjunction with a first gear, drives a transmission gear to rotate. Simultaneously, a pulley drives a second gear to rotate, enabling the first drive motor to simultaneously provide a drive source for multiple sets of spindles. This causes the spindles to drive multiple sets of filter cartridges to rotate simultaneously. When exhaust gas enters the filter box, it contacts and collides with the exhaust gas in conjunction with the rotation of the filter cartridges. This causes particulate impurities in the exhaust gas to be blocked and filtered onto the filter cartridges, thereby removing particulate impurities from the exhaust gas and achieving a rapid and efficient filtration effect.

[0018] 3. This invention provides an energy-saving boiler exhaust purification system and method. By meshing a second drive gear with a gear disc, when exhaust gas enters the purification chamber, a booster cylinder, in conjunction with a piston rod and piston plate, applies pressure inside the rotating drum. Simultaneously, a second drive motor is activated to drive the gear disc to rotate, thereby driving the rotating drum to rotate on the top of the horizontal plate. This allows the reducing agent inside to be pressurized and simultaneously generate centrifugal force, dispersing it from the nozzles into the purification chamber. Through full contact between the catalyst and the reducing agent and the exhaust gas, a chemical reaction occurs, achieving the purification effect of removing nitrogen oxides and sulfur oxides from the gas. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the second perspective structure of the present invention; Figure 3 This is a schematic diagram of the fan structure of the present invention; Figure 4 This is a schematic diagram of the internal structure of the filter box of the present invention; Figure 5 This is a schematic diagram of the rotating drum structure of the present invention; Figure 6 This is a schematic diagram of the second drive motor structure of the present invention; Figure 7 This is a schematic diagram of the piston plate structure of the present invention.

[0020] The components include: 1. Exhaust gas collection assembly; 2. Filter box; 3. First drive device; 4. Filter assembly; 5. Ventilation pipe; 6. Purification device; 7. Pressurization mechanism; 8. Second drive device; 9. Rotary drum; 11. Gear disc; 10. Exhaust pipe; 101. Fan; 102. Exhaust gas collection pipe; 103. Outer expansion hopper; 301. First drive motor; 302. First gear; 303. Transmission gear; 401. Mandrel; 402. Filter cartridge; 304. Pulley; 305. Second gear; 601. Purification chamber; 602. Air inlet; 603. Horizontal plate; 701. Pressurization cylinder; 702. Piston rod; 703. Piston plate; 801. Second drive motor; 802. Second drive gear. Detailed Implementation

[0021] The following is in conjunction with the appendix Figure 1 -Appendix Figure 7 This application will be described in further detail below.

[0022] Example 1: An energy-saving boiler exhaust purification system, referring to Figure 2 , Figure 3 and Figure 5The system includes an exhaust gas collection assembly 1, a filter box 2 fixedly installed at the output end of the exhaust gas collection assembly 1, a first drive device 3 on the top of the filter box 2, a filter assembly 4 at the output end of the first drive device 3, a vent pipe 5 fixedly connected to one side of the filter box 2, a purification device 6 fixedly connected to one end of the vent pipe 5, a pressurizing mechanism 7 on the top of the purification device 6, a second drive device 8 on the top of the purification device 6, a rotating cylinder 9 rotatably connected inside the purification device 6, a geared disc 11 fixedly installed on the top of the rotating cylinder 9, the output end of the second drive device 8 meshing with the geared disc 11, the output end of the pressurizing mechanism 7 extending into the interior of the rotating cylinder 9, an exhaust pipe 10 fixedly connected to one side of the purification device 6, and several spray holes on the rotating cylinder 9. The system utilizes the suction force generated inside the exhaust gas collection assembly 1 to... The exhaust gas generated in the boiler is transported to the interior of the filter box 2, and the first drive device 3 drives the filter assembly 4 to operate inside the filter box 2, colliding and contacting with the incoming exhaust gas. This allows particulate impurities in the exhaust gas to be adsorbed and filtered inside the filter box 2. The pre-filtered exhaust gas is then transported to the purification device 6 through the ventilation pipe 5. The second drive device 8 drives the gear disc 11 to rotate the rotating drum 9, and the pressurizing mechanism 7 pressurizes the reducing agent liquid inside. This causes the pressurized catalyst to form small liquid particles that are dispersed in all directions of the purification device 6, allowing the catalyst to fully contact the gas and react. Nitrogen oxides and sulfur oxides are removed through oxidation. This combination enables the boiler exhaust gas to be fully filtered and purified, and simplifies the process, reducing energy consumption in the exhaust gas purification process.

[0023] Example 2: An energy-saving boiler exhaust purification system, referring to Figure 4 and Figure 5The first driving device 3 includes a first driving motor 301. A first gear 302 is fixedly mounted on the output end of the first driving motor 301. A transmission gear 303 meshes with one side of the first gear 302. The output ends of both the first gear 302 and the transmission gear 303 are threadedly connected to the filter assembly 4. The filter assembly 4 includes a spindle 401. A filter cartridge 402 is sleeved on the outer surface of the spindle 401. A pulley 304 is provided at the output end of the first driving motor 301. A second gear 305 is fixedly connected to the output end of the pulley 304. The number of spindles 401 and filter cartridges 402 is set to several. By starting the first driving motor 301, the first gear 302 is driven to rotate, thereby driving the transmission gear 303 to rotate in opposite directions. The operation of the filter assembly 4 provides a driving force for its rotation, allowing it to rotate and change its contact surface with the exhaust gas. The first drive motor 301 and the first gear 302 work together to drive the transmission gear 303 to rotate, while the pulley 304 drives the second gear 305 to rotate. This allows the first drive motor 301 to simultaneously provide a driving source for multiple sets of spindles 401, which in turn drive multiple sets of filter cartridges 402 to rotate simultaneously. When the exhaust gas enters the filter box 2, the filter cartridges 402 rotate and collide with the exhaust gas, causing particulate impurities in the exhaust gas to be blocked and filtered onto the filter cartridges 402. This process effectively removes particulate impurities from the exhaust gas, achieving a fast and efficient filtration effect.

[0024] Example 3: An energy-saving boiler exhaust purification system, referring to... Figure 6 and Figure 7The pressurization mechanism 7 includes a pressurization cylinder 701, inside which a piston rod 702 is disposed. One end of the piston rod 702 is fixedly connected to a piston plate 703. The piston rod 702 extends into the interior of the rotating drum 9. The second drive device 8 includes a second drive motor 801, the output end of which is fixedly connected to a second drive gear 802. The second drive gear 802 meshes with the gear disc 11. By placing the pressurization cylinder 701 at the top of the purification chamber 601, when exhaust gas enters the purification chamber 601, the pressurization cylinder 701 is activated, causing it to drive the piston rod 702 to extend downward and push the piston plate 703 into the interior of the rotating drum 9, thereby applying pressure to the reducing agent liquid inside, so that it can be squeezed out of the interior of the rotating drum 9 and sprayed out. When the gas is sprayed from the nozzle and reacts with the catalyst, it comes into full contact with the reducing agent, resulting in an oxidation-reduction reaction that removes nitrogen oxides and sulfur oxides. By meshing the second drive gear 802 with the gear disk 11, when the exhaust gas enters the purification chamber 601, the booster cylinder 701, in conjunction with the piston rod 702 and piston plate 703, applies pressure inside the rotating drum 9. At the same time, the second drive motor 801 is started to drive the gear disk 11 to rotate, which in turn drives the rotating drum 9 to rotate on the top of the horizontal plate 603. This causes the reducing agent inside to be pressurized and then dispersed from the nozzle into the purification chamber 601 by generating centrifugal force. After the catalyst and reducing agent come into full contact with the exhaust gas, a chemical reaction occurs, thereby achieving the purification effect of removing nitrogen oxides and sulfur oxides from the gas.

[0025] The implementation principle of this application embodiment is as follows: During use, the waste gas collection pipe 102 is connected to the boiler exhaust pipe. By starting the fan 101, the internal suction force is generated to draw the waste gas into the outer expansion hopper 103 and then into the filter box 2. At the same time, the first drive motor 301 is started to drive the first gear 302 to drive the transmission gear 303 to rotate. In conjunction with the pulley 304, the second gear 305 is driven to transmit power, so that the two sets of spindles 401 drive the filter cartridge 402 to rotate, which collides and contacts with the waste gas entering the filter box 2. This causes the particulate impurities in the waste gas to be blocked and adsorbed on the surface of the filter cartridge 402. After preliminary filtration, the gas is further conveyed into the purification chamber 601 through the ventilation pipe 5. The purification chamber 601 is filled with catalyst. The reducing agent is pressurized by activating the booster cylinder 701, which drives the piston rod 702 to extend into the purification chamber 601. The piston plate 703 with perforations continuously pushes the reducing agent downwards along the inside of the rotating drum 9. At the same time, the second drive motor 801 is activated, which causes the second drive gear 802 to rotate and drive the gear disk 11 to rotate the rotating drum 9. This causes the piston plate 703 to pressurize the reducing agent liquid inside the rotating drum 9, while the rotating drum 9 causes the reducing agent inside to generate centrifugal force, which disperses the reducing agent liquid into particles and sprays it out from the nozzle. This, together with the catalyst inside the purification chamber 601, allows for full contact and reaction with the exhaust gas to remove nitrogen oxides and sulfur oxides. The gas after filtration and purification is discharged through the exhaust pipe 10.

[0026] This application also discloses an energy-saving boiler exhaust purification method, based on the above-mentioned energy-saving boiler exhaust purification system, including the following steps: S1: Connect the input end of the exhaust gas collection pipe 102 to the boiler exhaust port, and connect the outer expansion hopper 103 to the filter box 2. Start the fan 101 to draw the exhaust gas generated in the boiler into the interior of the filter box 2.

[0027] S2: Start the first drive motor 301 to drive the first gear 302 and the pulley 304 to rotate simultaneously, thereby driving the transmission gear 303 and the second gear 305 to rotate. At the same time, the two sets of spindles 401 and filter cartridges 402 rotate inside the filter box 2 and collide with the incoming exhaust gas to adsorb and filter the impurities in the exhaust gas and remove particulate matter.

[0028] S3: The filtered exhaust gas enters the purification chamber 601 through the square vent pipe 5. The purification chamber 601 is filled with catalyst, and the reducing agent is introduced into the rotating drum 9. At the same time, the booster cylinder 701 is activated to drive the piston rod 702 to extend into the rotating drum 9 and push the piston plate 703 downward to pressurize the reducing agent inside the rotating drum 9 so that it is sprayed out from the nozzle of the rotating drum 9.

[0029] S4: After the exhaust gas enters, the second drive motor 801 is started simultaneously to drive the second drive gear 802 to rotate the gear plate 11, thereby driving the rotating drum 9 to rotate synchronously. This causes the reducing agent inside the rotating drum 9 to generate centrifugal force while being pressurized and sprayed into all directions inside the purification chamber 601, so that the exhaust gas reacts with the injected reducing agent to remove nitrogen oxides and sulfur oxides. Finally, the purified gas is discharged through the exhaust pipe 10.

[0030] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. An energy-saving boiler exhaust purification system, comprising an exhaust gas collection component (1), characterized in that: The output end of the exhaust gas collection component (1) is fixedly installed with a filter box (2). The top of the filter box (2) is provided with a first drive device (3). The output end of the first drive device (3) is provided with a filter component (4). One side of the filter box (2) is fixedly connected with a vent pipe (5). One end of the vent pipe (5) is fixedly connected with a purification device (6). The top of the purification device (6) is provided with a pressurizing mechanism (7). The top of the purification device (6) is provided with a second drive device (8). The inside of the purification device (6) is rotatably connected with a rotating cylinder (9). The top of the rotating cylinder (9) is fixedly installed with a gear plate (11). The output end of the second drive device (8) meshes with the gear plate (11). The output end of the pressurizing mechanism (7) extends into the inside of the rotating cylinder (9). One side of the purification device (6) is fixedly connected with an exhaust pipe (10). Several spray holes are opened on the rotating cylinder (9).

2. The energy-saving boiler exhaust purification system according to claim 1, characterized in that: The exhaust gas collection assembly (1) includes a fan (101), the top of which is fixedly connected to an exhaust gas collection pipe (102), and the output end of the fan (101) is fixedly connected to an external expansion hopper (103). The interior of the external expansion hopper (103) is connected to the interior of the filter box (2).

3. The energy-saving boiler exhaust purification system according to claim 1, characterized in that: The first driving device (3) includes a first driving motor (301), a first gear (302) is fixedly installed at the output end of the first driving motor (301), a transmission gear (303) is meshed on one side of the first gear (302), and the output ends of the first gear (302) and the transmission gear (303) are threadedly connected to the filter assembly (4).

4. The energy-saving boiler exhaust purification system according to claim 3, characterized in that: The filter assembly (4) includes a spindle (401), and a filter cartridge (402) is sleeved on the outer surface of the spindle (401). A pulley (304) is provided at the output end of the first drive motor (301), and a second gear (305) is fixedly connected to the output end of the pulley (304). The number of spindles (401) and filter cartridges (402) is set to several.

5. The energy-saving boiler exhaust purification system according to claim 1, characterized in that: The purification device (6) includes a purification chamber (601), an air inlet (602) is provided on the inner wall of the purification chamber (601), a horizontal plate (603) is fixedly connected inside the purification chamber (601), and the rotating cylinder (9) is rotatably connected to the top of the horizontal plate (603).

6. The energy-saving boiler exhaust purification system according to claim 1, characterized in that: The boosting mechanism (7) includes a boosting cylinder (701), and a piston rod (702) is provided inside the boosting cylinder (701). A piston plate (703) is fixedly connected to one end of the piston rod (702), and the piston rod (702) extends into the interior of the rotating cylinder (9).

7. The energy-saving boiler exhaust purification system according to claim 1, characterized in that: The second drive device (8) includes a second drive motor (801), and a second drive gear (802) is fixedly connected to the output end of the second drive motor (801). The second drive gear (802) meshes with the gear plate (11).

8. An energy-saving boiler exhaust purification method, based on the energy-saving boiler exhaust purification system according to any one of claims 1-7, characterized in that: Includes the following steps: S1: Connect the input end of the exhaust gas collection pipe (102) to the boiler exhaust port, and connect the external expansion bucket (103) to the filter box (2). By starting the fan (101), the exhaust gas generated in the boiler is drawn into the filter box (2). S2: Start the first drive motor (301) to drive the first gear (302) and pulley (304) to rotate simultaneously, thereby driving the transmission gear (303) and the second gear (305) to rotate. At the same time, the two sets of spindles (401) and filter cartridges (402) rotate inside the filter box (2) and collide with the incoming exhaust gas to adsorb and filter the impurities in the exhaust gas, removing particulate matter. S3: The filtered exhaust gas enters the purification chamber (601) through the square ventilation pipe (5), the purification chamber (601) is filled with catalyst, and the reducing agent is introduced into the rotating drum (9). At the same time, the booster cylinder 701 is started to drive the piston rod (702) to extend into the rotating drum (9) and push the piston plate (703) downward to pressurize the reducing agent inside the rotating drum (9) so that it is sprayed out from the nozzle of the rotating drum (9); S4: After the exhaust gas enters, the second drive motor (801) is started at the same time to drive the second drive gear (802) to drive the gear plate (11) to rotate so as to drive the rotating drum (9) to rotate synchronously. The reducing agent inside the rotating drum (9) generates centrifugal force while being pressurized and is sprayed into various directions inside the purification chamber (601), so that the exhaust gas reacts with the injected reducing agent to remove nitrogen oxides and sulfur oxides. Finally, the purified gas is discharged through the exhaust pipe (10).

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